Anchor Rod — ASTM F1554 (Grade 36 / 55 / 105)
ASTM F1554 is the U.S. standard for anchor bolts cast into concrete foundations. The standard defines three grades by yield strength. F1554 anchor rods are typically supplied with matching nuts and plate washers, sometimes with a heavy hex head on the embedded end.
Specifications
| Standard | ASTM F1554 |
|---|---|
| Grades | 36 (36 ksi yield), 55 (55 ksi yield, weldable), 105 (105 ksi yield, high-strength) |
| Diameter Range | 1/4" – 4" |
| End Configurations | Headed, Hooked (J/L bend), Plate-end, Threaded with nut and plate |
| Surface Finish | Plain, HDG |
| Documentation | MTC, color-coding per F1554 (blue = G36, yellow = G55, red = G105) |
Frequently Asked Questions
Which F1554 grade is most common?
Grade 55 is the workhorse for general structural foundation work — column base plates, equipment mounts, light-pole bases. Grade 36 is used where weldability matters and strength requirements are modest. Grade 105 is reserved for heavily loaded or seismic applications where smaller anchor bolts must carry high loads.
Are F1554 anchor rods color-coded?
Yes. F1554 specifies a color code on the protruding (above-grade) end: blue for Grade 36, yellow for Grade 55, and red for Grade 105. This allows site verification of grade after installation.
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